#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
	int a = 0;
	int b = 0;
	float c = 0;
	scanf("%d %d", &a, &b);
	c = (b * 1.0) / (a * 1.0);
	printf("%.3lf%%", c*100);
	return 0;
}